Buildings may be erected, altered or used and land may be used for any of the following purposes and no other:

There shall be a maximum site area of one acre. There shall be a minimum lot area of 4,840 square feet per unit; provided, however, that if a lot contains more than one detached residential structure, no more than nine units may be constructed upon a site area of one acre. The total building area shall not exceed 65% of the lot area, and no lot can be created with a lot area of less than 2,000 square feet.

There shall be a front yard, the depth of which shall be at least 25 feet from the property line, parking area, interior roadway, state or Town-maintained roadway.

There shall be a rear yard, the depth of which shall be at least 10 feet. There shall be two side yards, one on each side of a main building, neither of which shall be less than 10 feet wide.

Dwelling units and individual lots may be held in separate ownership, if separate utility systems are provided.

At least 50% of the dwelling units in any one grouping or structure shall be two-story units, unless waived by the Planning Commission based upon the character of the existing neighborhood.

The regulations set forth in this article are supplemented or modified by the provisions contained in the following articles:

Definitions are set forth in Article III.